Revive a dead 18v drill with 20v Lithium battery

I got this 18V drill from Harbor Freight about 10 years ago. The battery is dead after one year used. It's been lying inside a drawer ever since. While working on a different project last night I happen to see it. I thought it could be fun to just mount a 20V lithium battery on it to see if it will work. Well. What do you know! It works like a charm. Not too hard to build the adapter with some scrap wood I have around. Took me around an hour to just cut, drill, and glue things together. I did leave the adapter to dry overnight before using it. I guess if I don’t bang it too hard it may last a while. Didn’t think it will be interesting to make a video out of it. So just sharing some quick photos and videos of the finished product with you guys. Of course the motor will burn out some day (hopefully not too soon).Frankly, even running it at 20v, this drill motor is just weak….. One of not so great products from Harbor Freight. They do have some good cheap stuff, but just not this drill. Nevertheless, now I got an extra drill lying around and I am happy about it. Here are some photos and video to show you guys. 

Ideally any 20V or 18V battery with a right adapter mount will work with most battery power drill out there (Ideally). Just need to spend a little time to figure out the battery terminals and the drill connector terminals. 

The 20V battery is from a Black & Decker Matrix drill (I like this drill/driver)

My mount and adapter is made with wood, screws, wire and an old power cord connector. I cut open the connector to take out the metal pins to use for the adapter build. Here is a quick video to show you how the revived drill worked.  I am happy with the result.